Octafluorocyclobutane
| Octafluorocyclobutane | |
|---|---|
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Octafluorocyclobutane |
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Other names
Freon-C-318, perfluorocyclobutane |
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| Identifiers | |
| CAS number | 115-25-3  |
| EC number | 204-075-2 |
| Properties | |
| Molecular formula | C4F8 |
| Molar mass | 200.03 g/mol |
| Appearance | colourless gas |
| Density | 1.654 at -20 °C
8.460 kg/m^3 (gas at 15°C and 1 atm), ~6.91 times air) |
| Melting point |
-40.1 °C |
| Boiling point |
-6 °C |
| Solubility in water | low |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Octafluorocyclobutane, or perfluorocyclobutane, C4F8, is an organofluorine compound which enjoys several niche applications. It is related to cyclobutane by replacement of all C-H bonds with C-F bonds. Octafluorocyclobutane is produced by the dimerization of tetrafluoroethylene and the reductive coupling of 1,2-dichloro-1,1,2,2-tetrafluoroethane.[1]
[edit] Applications
In the production semiconductor materials and devices, octafluorocyclobutane serves as a deposition gas and etchant. It has also been investigated as a refrigerant in specialised applications, as a replacement for ozone depleting chlorofluorocarbon refrigerants. Exploiting its volatility and chemical inertness, octafluorocyclobutane may be found in some aerosolized foods. It is listed by the Codex Alimentarius under number E946. It is investigated as a possible replacement for sulfur hexafluoride as a dielectric gas.
[edit] References
- ^ G. Siegemund, W. Schwertfeger, A. Feiring, B. Smart, F. Behr, H. Vogel, B. McKusick “Fluorine Compounds, Organic” in “Ullmann’s Encyclopedia of Industrial Chemistry” 2005, Wiley-VCH, Weinheim. doi:10.1002/14356007.a11 349
[edit] Appendix
Its critical point is at 115.3 °C and 2.79 MPa.
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